Film movement mechanism



Dec- 5, 1944- A. w. TONDREAU M 2,364,490

FILM MOVEMENT MECHANISM Filed Feb. 17, 1945 6l Sheevs-Sheet l l Y A! NWN I f2 m 131 .A fro/@NEX 5 1944- A. w. TONDREAU FILM MOVEMENT MECHANISM Filed Feb. i7, i945 .6 Sheets-Sheet 2 .ATT @Me-x Dec. 5, 1944.

A. W. TONDREAU AFILM MOVEMENT MECHANISM Filed Feb. 17, 1943 6 Sheets-Sheet 3 LSEQT W/voeE/lu,

Dec. 5, 1944- A. w. ToNDREAu FILM MOVEMENT MECHANISM Filed Feb. 17. 1943` 6 Sheets-Sheet 4 5, 1944. A. w. TONDREAU FILM MOVEMENT MECHANISM Filed Feb. 17. 1945 6 Sheets-Sheet 5 VVE/V702. 41.5597 WND'QEA@ 5, 1944. A. w. TQNDREAU FILM MOVEMENT MECHANISM Filed Feb. 17, 194.3 @Sheets-Sheet 6 INVENTOR. Wffvoe/q@ ATTOR E'YV Patented Dec. 5, 1944 FILM MOVEMENT MECHANISM Albert W. Tondreau, Hollywood, Calif., assignor to Warner Bros. Pictures, Inc., New York, N. Y., a corporation of Delaware Application February 17, 1943, seria1N0.47s,1so

7 Claims.

The present invention relates to a film movement mechanism particularly useful for a camera for color photography, or for other situations where a single lm or a bipack is to be used.

An object of the invention is to improve as well as facilitate assembling, adjusting and repairing the working parts of the film movement mechanism. v

For fuither details of the invention reference may be made to the drawings wherein;

Fig. 1 is a vertical sectional View of a camera embodying the film movement mechanism of this invention.

Fig. 2 is an end view of the shutter illustrating its flange in section. Y

Fig. 3 is an enlarged transverse sectional view taken on line 3--3 of Fig. 1.

Fig. 4 is a detailed sectional view of the telescoping drive connection between the shiftable camera and the power supply.

Fig. 5 is an enlarged transverse view taken on line 5-5 of Fig 1.

Fig. 6 is an enlarged fragmentary detailed sectional view of the film movementmeans, the optical system-and their associated parts.

Fig. 7 is an enlarged detailed sectional View taken on line 1 1 of Fig. 6.

Fig. 8 is a. detailed sectional view taken on line 8-8 of Fig. 6.

Fig. 9 is an enlarged detailed sectional view taken on line 9-9 of Fig. 8.

Fig. 10 is a diagrammatic View illustrating the drive means in full lines and the camera outline in dot and dash lines, looking n the direction indicated by line Ill-I on Fig. 3.

Fig. 11 is an enlarged sectional View of orthochromatic film and Fig. 12 is an enlarged sectional view of the panchromatc film.

Fig. 13 is a front View in elevation of the camera but with a modified door ,having a bulge to accommodate the iilm loop.

Referring in detail to the drawings, particularly Figs. 1, and 6, the camera comprises a housing I for housing the means for traversing two lms I9 and 2|] through the housing I and across the exposure apertures 49 and 49a served by the objective lens L.

The housing I is a box-like shell divided into two compartments 4 and 5 by a midrib 6. The compartment 4 houses the lm handling means generally indicated at 2 and including the feed sprockets I3 and I4, common sprocket 40, lm movements 56 and 56a and take-up sprockets 99 and |00. The compartment 5 houses the drive means generally indicated at 3,v for the aforesaid sprockets and film movements. Two doors 'I and 8 close the opposite sides of the housing I and provide access to the compartments 4 and 5 respectively. The door 'I is hinged at 1' and covers substantially the entire one side of the housing I. The peripheral edge of the door 'I conforms to the contour of the housing I and is provided with cooperating stepped shoulders 9 to maintain a light seal therewith. The door 8 covers substantially the entire other side of the housing II, except for the well |83 (Fig. 5) and is secured thereto by suitable screws I0.

The midrib 6 is a plate-like member arranged vertically in the housing I in a plane parallel to the main optical axis A of the camera and offset relative thereto. The. midrib 6 is secured to an inwardly projecting flange II formed .integral with the walls of the housing I (see Figs. 1, 3 and 5). The midrib 6 is removably secured to the fiange II by suitable screws I2 spaced around its periphery. The midrib 5 carries or supports the film handling means 2 on one side thereof, and the drive means 3 for the same on its other side, and is readily secured to and removable from the housing as a unit through opening door l, for ease in assembling, adjusting and repairing the working parts of the camera.

The film handling means 2 includes a pair of continuously driven feed sprockets I3 and I4 (see Fig. 5) secured side by side to a common shaft I5. The shaft I5 is mounted for rotation by a pair of antifriction bearings I6 arranged in a boss I1 on the midrib 6 and is rotated by the drive 3 as will be later described. The feed sprockets I3 and I4 feed the film into the camera from a lm supply magazine I8 which contains two reels of film I9 and 20. The lm I9 is preferably a panchromatic film substantially equally sensitive to all colors while the film 20 is an orthof chromatic lm, more sensitive to blue than other colors. The magazine I8 containing `the films I9 and 20 is mounted on top of the housing I adjacent its rear edge. The magazine I8 has an eccentrically located mounting boss 2I (Figs. l and 5) on its under side which cooperates with a. raised seat 22 on the upper wall of the housing I. The film supply magazine I8 is removably secured to the housing by a flange 23 which extends around the seat 22 and closely receives the boss 2|, a rib 24 on the forward lower edge of the boss 2| cooperating with a groove 25 in the forward wall portion of the ange 23. A clamp screw 26 threaded through a downwardly and forwardly inclined opening in the rear portion ofthe flange 23 engages in a notch 2l in the rear side of boss 2|, to removably secure the magazine to the housing I.

The films I9 and 26 coming from the magazine I8 are kept taut by a conventional friction brake (not shown) and are passed down between a pair of rollers 29 and 36 in the opening 3| of the magazine I8.

The films I9 and 26 continue downward through a registering opening 3| a in the upper wall of the housing I and then past a pair of guide rollers 32 and 33 mounted on a stub shaft 2|0 projecting from midrib 6. The films I9 and 20 are then trained around the feed sprockets I3 and I4. Suitable retractable rollers 34 and 35 on arm 36 retain the films I9 and 20 in engagement with the sprockets I3 and I4 and the rollers 34 and 35 are held in engagement with the films by a cam latch 3l. The films I9 and 20 upon leaving the sprockets I3 and I4 move 'forwardly in the housing I. The lm I9, the outermost film is given a back loop 38 (see Fig. 1) to side step the lm I9 to bring iilm I9 into the same planeas the nlm 20 and they are then trained over a common continuously driven sprocket 40 with the emulsion of nlm I9 in contact with the emulsion of the film 26. The lms 9 and 20 are retained on sprocket 40 by suitable retractable rollers 4I The sprocket 40 is secured to a shaft 42 rotata bly carried by apair of anti-friction bearings 43 f (see Fig. 3) mounted in a boss 44 on the midrib 6. The shaft 42 projects through the midrib 6 and into the compartment to be rotated by the drive means 3k to be later described.

l The lms I9, leaving the common sprocket in face to face relation, form a bi-pack and are trained down through a guideway slot 45 formed between aperture plate 46 and the back plate 241. The upper portion of the slot 45 is curved while the lower portion is straight and normal to the main axis Aof the optical system. The aperture plate 46 forms a part of the front wall of the housing I` and its front side is flush therewith and its aperture 49 occurs at the straight portion of the slot in line with the main axis A of the optical system.

The aperture plate 46 is secured to a movement mounting plate 56 by screws V5I and 52, land plate 52 in turn is secured to the midrib 6 by screws 53.Y The front line of the plate as it appears in Fig. 6 is the same as the front line of aperture plates 46 and 46a, both of which are the front line or surface of the front Wall 2| I. The back plate 4| is arranged closely adjacent to the plate46, allowing just enough space for the thickness of iilms I 9 and 20 with a suitable clearance. The back plate 41 is secured to the mounting plate 50 by screws 54 passing through a ilange 55 'formed on the back inner edge of'the plate 4'I. Screws 54 are threaded into the movement mounting plate 50.

As indicated in Figs. 11 and 12, the orthochromatic filn 20 has an emulsion X which is highly sensitive to blue for recording a blue sensation record when exposed at the aperture 49- and also has' a red dye Y over the emulsion X which acts as a red filter Yfor the bi-pack, thus repack, a distance of two picture frame areas at a time leaving every other picture frame area unexposed for a purpose to be later described.

I provide an improved iilm movement means 56 for advancing the films I9 and 20 as a bi-pack, and a similar means 56a for advancing only a single lm I9. As shown particularly in Fig. 6, the lm movement 56 comprises lm engaging claws or pins 5'I formed on the outer end of an arm 58. The arm 58 is a double ended lever pivoted intermediate its ends on a crank pin 59 formed eccentrically on a shaft 60. As shown in Fig. 7, the shaft 60 is rotatably mounted in a bearing support 260 secured to the movement mounting plate 50 by screws 60h. The shaft 60 is continuously rotated by the drive means 3, and particularly by gear shown also in Fig. 10. Similarly shaft 60a is driven by gear |63. As

' further shown in Fig. '7 the bearing support 266 is in the form of an open ended tube, the right end of which houses bearing 233 and the left end of which ts in aperture 234 in plate 56 and projects beyond the front of plate 50 where it is provided with screw threads 220 engaging with a screw-threaded cap 22| which retains the bearing sleeve 222 and in fact the whole assembly on shaft 6I) in position in the support 260. The shaft 60 is journaled in a bearing 223 in the sleeve 222, both of the latter projecting to opposite sides of plate 5|). The bearing support 266 has a flange 224 which is secured to the rear side of plate 50 by the screws 60b, while plate 6 has an aperture 225 which is larger than the flange 224 and through which the bearing support 266 and the parts carried thereby may be withdrawn to the left, when plate 50 is detached from plate 6. -A washer 226 `is secured against rotation at the end of bearing sleeve 222, by pin 221. A washer 228 having apertures for a lubricant bears against the right side of washer 226. Shaft 60 has a shoulder 229 and the washer 230 ts it and bears against washer 22B, and in turn gear |65 bears to the left against washer 230. Gear |65, washers 226, 228 and 230, sleeve 222, bearing 223 and washer 236 are retained under compression against the eccentric 6l, by means of a nut 23| on the screw-threaded portion 232 of the reduced section 360 of shaft 60, all of those parts forming the shaft assembly. The bearing support 260 at its outer right end terminates in a bearing 233 for the further reduced right end 460 of the shaft 60. After removing the register pin drive elements 81, 86, 89 and 90 from the right end of shaft 66, and after unscrewing the cap 22|, the shaft 60 and its assembly may be withdrawn to the left from the tubular bearing support 260, while leaving the latter secured to plate 50.

The pull-down mechanisms 56 and 56a may be separated from the drive sprockets 40, I3 and 99, by separating plate 56 from plate 6. There is no mechanical connection between the pull-down mechanisms 56 and 56a and their respective register pin mechanisms, at the front of plate 56.

and their component parts are each readily accessible as a unit for ease in assembling, adjusting and repairing the working parts.

The crank pin l59 works in an elongated slot 6| in the arm 58 and is provided with a hardened wear taking block 62. A retaining washer 63 is attached to the end of the pin 59 by a screw 64 to hold the block 62 and .the arm 53 against displacement from the shaft 69. Washer 235 lits between arm 58 and block 62 at the front thereof, and ring 66 and eccentric 61 at the back thereof. Ring 66 and eccentric 61 t against washer 236 which bears on the end of bearing sleeve 222 and bearing 223. The inner end of the arm v58 is pivotally connected at 65 to an oscillating ring 66. Ilhe ring 66 surrounds an eccentric 61 formed on the shaft 69. The axis of the eccentric 61 is diametrically opposite the axis of the crank pin 99 to give the desired motion to the arm 58. The

ring 66 has an anchor 68 diametrically opposite i As the shaft 69 rotates, the crank pin 59 in being diametrically opposite the eccentric 61, gives the arm 58 a smoother action with much less sawing oi its pins 51 in the perforations of the nlm. The crank pin 59 with the aid of the oscillating ring 66 gives the arm 58 the desired swing motion while the oscillating ring 66 alone produces the reciprocation of the arm 53 and the reciprocati-cn of the arm occurs while the crank pin 59 is dwelling, thus allowing the pins 51 to move into and out of the lm Derforations while the film remains still.

Suitable pilot pins 13' are employed in conjunction with the movement means 56` to hold the lm in register with the aperture 49 `while the exposure is taking place and the arm 58 is being retracted and returned to the successive lm enposition ready to advance the next portion of film. The pilot pins 13 are guided for recipn roca'tion in openings 14 in a boss 15 projecting from the mounting ange '55 of the back plate 41. The pins 13 engage in perforationg at opposite sides of the films I9, 29 and their inner ends are connected by. a platev16. The plate 16 is con nected a `push rod 11 whichA is slidably received in an opening 16 in a bearing block 19 attached to the movement mounting plate 50. The push rod 11 has a cam notch 99 formed in a thickened portion 9i (see Figs. 6 and 8)` and a cam 92 operating in the notch S9 reciprocates the rod 11 and its pins 13.

The cam 82 is formed on the end of a shaft 63 which is mounted for oscillation in a sleeve bearing 69. The shaft 83 lis eccentri'cally located in the sleeve 84 for purpose to be later described. The sleeve bearing 64 is carried in a tubular boss 95 secured to the movement mounting plate 59 by screws 66. A suitable connection 81 is provided between the shaft 6I] and the shaft 83. The connection 91 is located behind the midrib 6 in the compartment 5. Connection 61 comprises a connecting rod 90 pivotally connected at its upper end as shown in Fig. 7 to a crank pin 88 secured to the inner end o1' shaft 60, connecting rod 99 being pivotally connected at its lowerV end as shown at the top of Fig. 8 to a crank pin 99 secured to `the shaft B3. The radius of eccentricity of crank pin 89 is greater than that of crank pin 99 as indicated in Fig. 6. Rotation of shaft 60 -causes reciprocation of connecting rod 99 to oscilpins 13. The operation o f thepilot pins 13 is so timed that they remain in engagement with the perforations in the lms from the time the feeding pins 51 start to leave the perforations until Athey again are engaged in the perforations.

The` orthochromatic film 20 upon leaving the aperture 49 is directed towards 'the rear of the housing I while the panchromatic nlm i9 is given a back loop 9I to sidestep the rearwardly moving film 29 and is given another back loop 92 to bring it back into line again. on the other side of the nlm 29 (see Fig. 6). The panchromatic film i9 continues forward, with its emulsion side up, to traverse a second aperture 49d where the unexposed areas are successively subjected to a reiiected beam of light. A prism P is provided in the optical system to split the light lnto a'direct beam and a reiiected beam. Prism P is arranged between the lens L of the optical system and the apertures 49, 49a, as will later more fully be described. 'Ihe reflected light is passed through a plus green lter 95 carried by the aperture plate 46a, to make a green sensation record on the lm I9 between the alternate red records already on it. The aperture plate 46a is similar to aperture plate 46, but reversed in position and at right angles thereto. The nlm I9 is trained through a guide slot 95a, between the aperture plate 46a and a back plate 41a similar to plate 41. The axis of the diverted beam of light is substantially normal to the main axis A of `the optical system.

The film I9 is intermittently advanced through the guide slot 95a in synchronism with the advancement of film bi-pack I9, 29 through guide slot 45. Film movement means 56a similar to the above described means 56, advances the lm I9 and includes claws '51a on arm 58a for engaging the nlm E9. Arm 58a slidably receives crank pin 59e `and is pivotally connected at 65a to oscillatingring 66a. The ring 66a is mounted on eccentric 61a formed on shaft 69a which also carries crank pin 59a and is anchored at 69a. The operf ation of the nlm movement means 56a is sub.- stantially the same as the movement means 56 described above.

IPhe claw 51 works in a notch 41 in the back plate 41 and in a notch 46 in the front plate 46. Also the claw 51a works in a notch 410: in the back plate 41a, and in a notch 46a' in the front plate 46a. The length of travel of the claws 51 and V51d is substantially that of the length of the notches above described, as illustrated in Fig. 6.

The shaft 66 and v69d rotate in a clockwise direction which causes the claws 51 and '51a to sweep in a counter-clockwise direction, whereby the lms I9 and 20 move downwardly past the aperture 49, the lm I9 moving from right to left across the aperture 49a. The claws 51 and 51a move the lms I9 and 29 two picture frames at a time, with the result that lm 29 has only alternate frame areas exposed, while lm I9 has all picture frame areas exposed, the exposure of film I9 at' aperture 49 being in the even numbered l" rames and at aperture 49a in the odd numbered frames or vice versa.

Pilot pins 19al and their associated operating parts for the movement means 56a are identical with the aforedescrib'ed pilot pins 13 for the movement means 56 so the same numeral will appear on the drawings. v

Upon leaving the guide slot 45a, suitable guides 96 and 91 direct the film I9 in a U shaped path back towards the rearwardly moving film 2D; The two nlms I 9 and 20 are brought together and trained in superposed relation across the underside of the common sprocket 40 and held in cooperation therewith by retractable rollers 98. The films I9 and 20 then move downwardly and rearwardly to laterally spaced take-up sprockets 99 and |00 and held therewith by retractable rollers 99a and |00a (see Figs. l and 5). The lm |9 after leaving the common sprocket 40 ls given a back loop IOI to sidestep the film 20 and bring film |9 into line with its sprocket 99. The sprockets 99 and I 00 are fixed on shaft |02 mounted for rotation by spaced antifriction bearings I 03 in a boss |04 on midrib 6. The shaft |02 projects into the compartment 5 to be driven by the drive means 3 to be later described.

The films |9 and 20 upon leaving the take-ub sprockets 99, pass over guide rollers |05 (Fig. l) out through opening |06 in the rear wall of the housing I to be wound up in the take-up magazine |01 on reels |01a. The drive for reels I 01a will be later described. The construction of the magazine |01 and its means of attachment is identical with that of the supply magazine I8 described so as to be interchangeable therewith.

A shutter |I0 is mounted in a housing III for rotation on a shaft IIOa between the apertures 49, 49a and prism P. The housing I I I is mounted stationary relatively to the main camera housing I and the camera base |20, as will be subsequently described. The shutter I|0 is a disc-like body with an arcuate slot II2 (Fig. 6) which extends substantially 170 and registers with the aperture 49. An axially extending flange I I3 projects forwardly from and at right angles to the body I I0 and passes between the prism P and the aperture 49a and has a slot ||4 which registers with the aperture 49a. The bolt ||4 is of same extent as the slot |I2 and registers with the aperture 49a in synchronism with the slot ||2 registering with its aperture 49. The housing III has an opening |I|a which registers with aperture 49 and an aperture |||b which registers with aperture 49a. The housing |I| has its back wall close to the aperture plate 46 and its lower wall close to the aperture plate 46a with slight clearance. The forward end of the housing I I I is closed by a cover plate I I5. 'I'he cover plate ||5 carries the lens L and the prism P of the optical system. The

prism P is mounted in a suitable holder ||6 secured in an opening ||1 .in the cover plate ||5 and the lens holder I I6 is threaded into a tubular boss ||9 on the front of the cover ||5.

The camera housing I is mounted on a base |20 (Figs. 1 and 10) and is provided with guide Ways |2I and |22 at its front and rear edges respectively to allow for transverse movement of the camera with respect to the base |20. The shifting of the camera moves the axis of the view finder |23 into optical alignment with the main axis of the optical system. The view nder |23 is mounted on the door 1 (see Fig. 3) and includes a lens tube |24 having the usual ground glass and a prism located at the inner end of the view finder |23 in register with its window |25. The window |25 of the view i'lnder is brought into register with the opening IIIa in the shutter housing III upon shifting of the camera, so that the operator can look through the optics of the camera to see the exact areas exposed to the apertures 49 and 49a.

To provide for laterally shifting the camera, spaced racks |26 and |21 are attached to the underside of the housing adjacent the front and 'rear guideways I.2| and |22 (see Fig. l). Gears |28 and |29 engage the racks |26 and |21, respectively, and are xed on a common shaft |30 journaled in the base |20. The shaft |30 projects from the rear end of the base |20 and a manual operating handle |3I is fixed thereto. Suitable positioning means (not shown) may be provided to locate the camera in its two positions. The base |20 is provided with a threaded boss |32 exposed at its underside for receiving the holddown screw of the usual tripod mount (not shown) while the major portion of its lower side is covered by a plate |33.

The drive means 3 for the camera diagrammatically illustrated in Fig. 10, comprises a motor M clamped in a cradle |35 by a band |36 secured to cradle |35 by screws 2 3. Cradle |35 is mounted on a shelf |31 of the base |20 (see Fig. 3). The motor shaft |38 is connected with a shaft |39 through a suitable friction clutch indicated at |40. The outer end of shaft |39 is journaled in a bearing 2|4 xed in the lower end of a bracket |4I. Bracket I4I supports the shutter housing I I and it may be formed integral with the cradle |35 (see Figs, 3 and 4). The shaft |39 has a spiral gear I 42 incased in the lower end of the bracket 4|. The drive for the shutter ||0 includes a shaft |43 housed in a tubular bearing tube |44 formed on the back side of the bracket I4I. Shaft |43 has a spiral gear |45 at its lower end which meshes with the gear |42, and a spiral gear |46 at its upper end which meshes with a mating gear |41 on the shutter shaft ||0a.

The drive between the motor M and the drive means 3 in the housing I comprises a telescopic connection |48 (see Fig. 4) which permits the lateral shifting of the camera for view finding. The telescopic connection |48 comprises a shaft |49 mounted for rotation on spaced antifriction bearings I50 carried by the bracket |4I. The shaft |49 has a spiral gear |5| that meshes with the motor driven gear |42 on one end and a splined socket |52 in its other. A stub shaft |53 projects from the housing I through an opening |54 in the door 8. The shaft |53 is carried by spaced antifriction bearings |55 mounted in a boss |56 on the midrib 6. Shaft |53 has splines |51 formed in its projecting end portion for cooperating with the splined socket |52 of shaft |49 and carries a spiral gear |58. The gear |58 is located between the spaced bearings |55 and meshes with a mating gear |59 fixed on a shaft |60. The shaft I 60 is carried by spaced bearings |6| on the midrib 6 and is disposed at a 45 angle, being pitched upwardly and rearwardly adjacent the side of the midrib 6. 'I'he driven shaft |60 drives the two film movements 56 and 56a. A spiral gear |62 xed on the lower end of the shaft |60 meshes with a mating gear |63 on the shaft 60a of the film movement means 56a and a similar gear |64 located above gear |59 meshes with a gear |65 on the shaft 60 of the film movement means 56.

The driven shaft |60 drives a second angularly disposed shaft I 66 arranged at right angles to the shaft |60 but in a laterally spaced plane relative thereto. The shaft |66 is pitched downwardly and rearwardly and is driven by a pair of spiral gears |61 and |68 fixed to the upper ends of the shafts |60 and |66 respectively. The shaft |66 is connected to the shaft 42 of the common sprocket 40, to drive the same, by a pair of spiral gears |69 and |10 fixed on the shafts |66 and 42, respectively. The lower take-up sprockets 99, |00 are also driven by the shaft |66, and a pair of spiral gears I1| and |12 xed to the ends of the shaft |66 and the shaft |02, respectively, connect the take-up sprockets 99, for rotation.

A third angularly disposed shaft |13 is driven by the shaft |66. The shaft |13 is arranged in the same vertical plane as the shaft |60 and paralleltherewith to have its axis normal to the aXis of the shaft |66. A pair of spiral gears |14 and |15 are fixed to the shafts |66 and |13, respectively. The shaft |13 is connected Vto the shaft of the feed sprockets I3 and I4 by a pair of spiral gears |98 and |99 xed to the shafts |13 and l5, respectively.

The shaft |13 forms a part of the drive for the take-up reels |01a and comprises a spiral gear |16 fixed to the shaft |13 and meshing with a mating gear |11 on a shaft |18. The shaft |18 is rotatably carried by spaced bearings |19, |19a (see Fig. 5) mounted in a boss |80 on the midrib 6. The gear |11 is arranged on the shaft |18 between the bearings |19, |190. and a pulley 18| is removably secured by screw |8|a to the outer end of the shaft |18 which projects through the side wall of housing A depression |83 formed in the side of the housing adjacent its rear edge receives the pulley 18| and the door 8 is notched at |84 to leave the pulley uncovered and readily accessible. A similar pulley |85 is connected to the shaft of the takeeup reels |01a and a suitable belt |86 connects the two pulleys |8| and |85 for rotation.

The usual friction drive (not shown) is pro vided in the shaft for the take-up reels |01a so as to properly take-up the films i9 and 20 regardless of the peripheral speeds required. The friction drivey in the take-up magazine |01 becomes the friction brake in the supply magazine I8 when used for the same, and vice versa as is common practice.

Counters |81 and |88 are provided to register the amount of nlmwound up on the reels |01a and also the amount used for each scene and are mounted on the back wall of the housing pair of miter gears |89 and |90 at each counter |81 and |88, respectively, are connected together by a common shaft |9|. The shaft |9| intermediate its ends, has a spiral gear |92 fixed thereto and a meshing gear |93 is secured on the outer end of a shaft |94. The shaft |94 is mounted for rotation in a boss |95 on the rear wall of the housing and carries a spiral gear |96 on its inner end. The gear |96 meshes with a mating gear |91 on the end of the shaft I5 of the feed sprockets I3, |4 adjacent the gear |08 (see Fig. 5).

Referring to Fig. 6 it will be seen that the L shaped aperture plates 46 and 46a merge with and fit in the angular front wall 2|| of the camera alongside of the movement mounting plate 50. The aperture plates 46 and 40a, have a light seal fit with wall 2|| by means `of cooperating stepped shoulders 2|2 and 2|3. The shoulders or light seals 2| 2 and 2|3 extend straight out at right angles to the plane of Fig. 6

until they 'meet door 1, as shown in Fig. 3, and the ends of these shoulders 2|2 and 2 I3 are light sealed by the inside of door 1. This is also shown in Fig. 13 where the outer ends of shoulders 2|2 and 2|3 are light sealed by door 215. The door 2 I5 may have a bulge 2 I6 to provide more space for loop 9|92. A

By opening door 1 and removing screws l2 which hold the plate 6 to thel flange Il, and by removing screw |8|a and pulley |8|, plate 6, with the film handling means 2 (including movement mounting plate 50 and aperture plates 46 and 46a), and with the nlm driving means 3 mounted thereon, may be removed as a unit through the opening of door 1, the telescopic connection |48 permitting shaft` |53 to be removed from socket |52, y Hence the film handling means 2 and the film drive 3 which forma unit with the plate 6, may be readily removed for inspection, adjustment, and repair. Y

The withdrawal of the pilot pins 13, 13a. for threading the films i9 and 20 through the i'llm movement means 56 and 56a is accomplished in a like manner and the description of threading the lms I9, 20 through means 56 is as follows. The camera is stopped Where its claws or pins 51 are retracted from the perforations in the films as illustrated in the drawings. The pilot pins 13 may then be retracted by turning the sleeve 84 (see Figs. 6, 8 and 9) which carries the eccentrically located cam shaft 83, 'all of which was described` above. Turning of the sleeve 84 results in bodily shifting of the shaft 83 and the retraction of the pilot pins 13, by the cooperation of the cam 82 in cam slo-t 80 of push rod 11 which in turn is connected with'the pilot pins 13. The sleeve 84 has an operating arm 200 which.l is accessible in compartment 4 of the housing The arm 200 lies adjacent the movement mounting plate 50 and has a releasable latch 20| (Fig. 9) for holding the arm in either its normal position or its retracted position. The latch 20| comprises a retractable plunger 202 which is guided for movement in a tubular sleeve 203 attached to the outer end of the arm 200. The plunger 202 has an enlargement 204 slidably received in a socket 209 in the sleeve 203. The enlargement 204 'is located on the plunger a slight distance from its inner end to leave a nose 206 which is selectively engaged in one of its two spaced locating openings 201 in the plate 50. A spring 208 surrounds the plunger 202 and is arranged between the bottom of the socket 205 and the enlargement 204 to releasably hold thel arm 200 in its set position. The latch 20| may include an arcuate guide `209 for the end of the arm which relieves the arm of any outward thrusts. Y

The pull-down means 56o:l being in the same timed relation with pull-down 56 Will also have its feed pins 51a retracted, and to retract its pilot pins 13a, one merely swings the arm 200a around after releasing latch 20|a. The film may then be readily threaded through thepull-downs 56 and 56a after which the arms 200 and 200:1J may be returned to their normal position and latched.

`After the films |9 and 2|) have been exposed in the camera above described, they may be Suitably developed, and then release prints may be prepared in any suitable manner. Some methods of `preparing release prints are disclosed in the copending application S. N. 440,797, filed April 28, 1942, by Byron C. Haskin, for Color photography, which application also discloses and claims the generic aspects of the method and means for color photography disclosed in the present application. This case is a continuation-in-part of S. N. 440,796, filed April 28, 1942, for Camera for color photography. The camera disclosed herein is claimed in my co-pending application 476,179, filed February 17, 1943. The lm registering mechanism disclosed herein is claimed in my co-pending application 476,181, filed February 17, 1943.

Various modifications may be made in the invention without departing from the spirit of the following claims.

I claim:

1. Film movement mechanism comprising the combination of a mounting plate having an aperture, a bearing support fitting said aperture, means at the rear of said plate for detachably securing said bearing support to said mounting plate, a shaft journaled in said bearing support, said shaft extending to opposite sides of said plate, an eccentric on said shaft at the front of said plate, a ring on said eccentric and claw mechanism connected with said ring, a bearing for said shaft in said bearing support, washer means separating said eccentric and its said ring from the front end of said bearing, a gear on said shaft at the rear side of said plate, washer means between said gear and.the adjacent end of said bearing, said shaft having a screw-threaded portion and a cooperating nut for retaining said gear against said last mentioned washer means, a

bearing in said bearing support for said shaft rearwardly beyond said threaded portion, a main plate having a sprocket thereon for said claw mechanism, said main plate having an aperture larger in size than said bearing support and said gear, and means removably securing said mounting plate to said main plate.

2. Film movement means comprising a mounting plate having an aperture and a main plate having a concentric larger aperture, a bearing support fitting the aperture in said mounting plate and movable through the aperture in said main plate, means detachably securing said bearing support to said mounting plate, a shaft journaled in said bearing support and projecting to opposite sides of both of said plates, a drive element on said shaft at the rear of said plates, film movement means on said shaft at the front of said plates, an aperture plate and a back plate for said lm movement means detachably secured to said mounting plate, and a sprocket for said lm movement means on said main plate.

3. Film movement mechanism comprising the combination of a mounting plate having an aperture, a tubular bearing support tting said aperture and extending to opposite sides of said plate, means at the rear of said plate for detachably securing said bearing support to said mounting plate, a shaft assembly in said tubular bearing support, said shaft assembly comprising (a) a shaft having an eccentric thereon at the front of said plate, (b) a bearing for said shaft, and (c) a gear on said shaft at the rear of said pla-te; said bearing .support having a bore in which said bearing and said gear are slidable detachable means at the front ofsaid plate for securing said shaft assembly in said tubular bearing support and permitting removal of said shaft assembly as a unit lengthwise through said tubular bearing support, and claw mechanism operatively connected with said eccentric.

4. Film movement mechanism according to claim 3 comprising a washer between said eccentric and the outer end of said bearing, washer meansengaging the inner end of said bearing and one end of said gear, and a nut on said shaft at the other end of said gear.

5. Film movement mechanism according to claim 3 wherein said shaft behind said gear is provided with an eccentric smaller than said aperture in said mounting plate, and La pilot pin drive removably connected to said last mentioned eccentric.

6. Film movement mechanism according to claim 3 wherein said shaft behind said gear is provided with an eccentric smaller ythan said aperture in said mounting plate, a pilot pin drive removably connected to said last mentioned eccentric, and a bearing for said shaft in said tubular support between said gear and said pilot pin eccentric.

7. Film movement mechanism according to claim 3 wherein said detachable means comprises a cap around said shaft, said cap having screw threaded engagement with the front end of said tubular bearing support and having a retaining ange in front of said bearing.

ALBERT W. TONDREAU. 

